GEOLOGICA CARPATHICA, OCTOBER 2010, 61, 5, 365—381 doi: 10.2478/v10096-010-0022-3 High resolution stratigraphy of the Jurassic-Cretaceous boundary interval in the Gresten Klippenbelt (Austria) ALEXANDER LUKENEDER1,*, EVA HALÁSOVÁ2, ANDREAS KROH1, SUSANNE MAYRHOFER1, PETR PRUNER3, DANIELA REHÁKOVÁ2, PETR SCHNABL3, MARIO SPROVIERI4 and MICHAEL WAGREICH5 1Geological and Paleontological Department, Natural History Museum, Burgring 7, 1010 Vienna, Austria; *
[email protected] 2Department of Geology and Paleontology, Faculty of Natural Sciences, Comenius University, Mlynská dolina G-1, 842 15 Bratislava, Slovak Republic;
[email protected];
[email protected] 3Institute of Geology, Academy of Sciences of the Czech Republic, v.v.i., Rozvojová 269, 165 00 Praha 6, Lysolaje, Czech Republic 4Institute for Marine and Coastal Environment (IAMC-CNR), Calata Porta di Massa (Interno Porto di Napoli), 80133 Napoli, Italy 5Department for Geodynamics and Sedimentology, Center for Earth Sciences, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria (Manuscript received February 8, 2010; accepted in revised form June 10, 2010) Abstract: The key objective of investigation of hemipelagic sediments from the Gresten Klippenbelt (Blassenstein For- mation, Ultrahelvetic paleogeographic realm) was to shed light on environmental changes around the Jurassic-Cretaceous (J/K) boundary on the northern margin of the Penninic Ocean. This boundary is well exposed in a newly discovered site at Nutzhof. Around the critical interval including the boundary, this new outcrop bears a rich microplanktonic assemblage characterized by typical J/K (Tithonian/Berriasian) boundary faunas. The Nutzhof section is located in the Gresten Klippenbelt (Lower Austria) tectonically wedged into the deep-water sediments of the Rhenodanubian Flysch Zone.